president barack obama has criticized republican senators for rejecting gun control legislation. the bill would have extended background checks on gun buyers. victims of gun violence were on hand to witness the bill's defeat. >> those campaigning for tighter gun laws always knew they'd face an uphill battle in congress. even to push through one of the least controversial measures expanding background checks on people who want to buy guns. it got a majority, but still failed because republicans forced what's known as a super majority, 60 votes. >> the amendment is not agreed to. the mother of one gun atrocity victim yelled out her dismay. >> shame on you! >> at the white house, a frustrated president obama blamed the defeat in part on the efforts of pro-gun groups to misrepresent the legislation. willful lies, he called it. >> and unfortunately, this pattern of spreading untruths about this legislation served a purpose. because those lives upset an intense minority of gun owners, and that in turn intimidated a lot of senators. >> joining obama were parents of children killed in la